Hi jhoepffner,

If you want to keep the precedent draw, just remove background();. Many people use it as a fade effect (they put a transparent mask in front of the whole scene). Here's an example:

Code:

void setup(){
  size(600,300,P3D);
  noStroke();
}

void draw()
{
  fill(255,10);
  rect(0,0,width,height);

  fill(255,100,100,50);
  pushMatrix();
  translate(width/2,height/2);
  rotateX(frameCount/100f);
  rotateZ(frameCount/10f);
  rect(-125,-125,125,125);
  popMatrix();
}
 

If you need to calculate transformation on points, you could use vector class as Vec3D (http://processing.unlekker.net/Vec3D.html - Marius Version). You could collect any points in arrays.

For the tablet, I wrote some sketches for handmade drawings. I used MIDI instead of OSC. It was done to use the tablet a VJ|Music controller. http://spacekit.ca/news/news/spacekit/161. It was fluid on any VST synths. It was fullscreen in openGL. Tell if you question on this.

You could have also a look for jMusic for midi.